Stored pressure medium container



Feb. 2, 1937. D. MAPES I STORED PRE SSURE MEDIUM CONTAINER Filed A ril9, 1932 2 Sheets-Sheet l INVENTOR DAN/EL MA PEJ FIGURE P W ZZ ATTORNEYFeb. 2, 1 937. I D. MAPES 2,069,708

STORED PRESS URE MEDIUM CONTAINER Filed April 9, 1932 2 Sheets-Sheet 2 I4/ II I I 2 I cg I -10 I I I I I I I I I I l I I I I I I I I I I I I I II I I I l I I FGUM 2 INVENTOR DA N/EL MA PCS ATTORNEY Patented Feb. 2,1937 Dani el, Manes, Upper Menteinir; to Wnlter'Kidde & Company, Inc.,N. 1., a corporation or New York N. 1., a ssig nor New York.

Application April 9, 1932 Serial No. 604,336

' min. (01. 220-63) The present invention relates to fire extin guishingapparatus employing a fire extinguishing liquid propelled by a mediumstored under pressure 'in'a cartridge or other container and 6 embodiesmore specifically animproved design of cartridge having the requisitestrength to resist the pressure in the cartridge and having additionallycorrosion resisting properties for enabling the strength of thecartridgegand other de- 1 sirable conditions to be maintained over along period of time.

It has been customary .to employ oneoifthe various steels iorpressurecartridges oi the type 'in question but the resultaTntcorrosiondue to submersion or partial submersion of the cartridge mediumhas not in the liquid fire only jeopardized but has rendered iscustomary to make on the cartridge. 02 course,

there isthe additional disadvantage of contamination of the liquidmedium and formation of sediment with possibility of clogging thedischarge line of the apparatus.

, It would seem at first possibleto vercome this defect by making thecartridge of amaterial highly resistant to corrosion but such materialsare either costly or lacking in the requisite extinguishing the strengthof the cartridge strength and in some instances porous to the pas- Jsage of mediums stored underhigh pressure, such, ior example, as liquidcarbon dioxide.

The present invention therefore contemplates the pnovision of a hightensile strength and non-porous material,- but having relatively poorcorrosion resisting properties, such, for example, 'as steel, and anenvelope tor the container completely surrounding it externally and otamaterial having relatively good corrosion resisting properties.

Such an envelope might consist of a shell of 40 copper, lead or the likeformed over the container proper, or the container proper might becoated with some corrosion resisting substance such as, porcelainorrubber solution.

The invention also contemplates the provision of means for retaining thepressure medium with-- in the cartridge and eflecting its releasethereirom, said means being formed of a material resistant to corrosionor 01 a material suitably o guarded against corrosion, as bynickel-plating, at points where danger of corrosion eirists.

The invention will now be described in greater detail in connection withthe accompanying drawings. wherein:

I Figure 1 is a'view in vertical, centraisection illegibleinscriptionswhich it container proper or relatively der I! in the neckof the shell and in turn sup- I Qther attendant vention may carryin theanother handle 4 for carrying the an inverted position, .6 and astandard hose pressure,

of a pressure cartridge or container in accordance with the irfvention.

Figure 2 is a central longitudinal sectional view oi an extinguisher-o!the type with which the inadvantageously employed.

.In Figure 2 o the drawings there is represented at l a standard shellor container for holding a liquid'fire extinguishing medium, such aswater, calcium chloride solution or other suitable fire extinguishingmedium, which is filled into the container up to the level of thefilling indicator 2; The shell is provided with a handle 3 forextinguisher in an erect position, extinguisher in a strainer i, anoutlet elbow coupled to the outlet elbow and having a discharge male 8.A cage comprising an upper flange I, a bottom plate]! and suspensionrods i l is supported upon a shoulports a cartridge I3 containing amediumunder such as liquid carbon dioxide, for propelling the liquidfire extinguishing medium from the sheli.. The cartridge, I3 is providedwith a coupling. containing means for eflecting release oi the pressuremedium irom the cartridge. said, releasing means becoming operative uponinversion and jarring oi the shell, whereby to cause iorcible engagementoi the releasing means with a projection it formed on a cap I andextending within the shell. {I'he 'cap i6 'is'threaded the neck of theshell with an intervening gasket I! which not only effects aleakage-tight v joint with the shell but secures the flange l of thecage against movement. The cap I6 is other- 35 wise standard, beingprovided with a rim It in? parrying the extinguisher in an uprightposition and for effecting rotation of the cap stand the high. pressureof the contained medium and to prevent leakage thereof irom thecartridge. These cartridges, however, are subject to considerablecorrosion by reason of their sub- -n ersion or partial submersion invarious types of liquid .fire extinguishing mediums. a d this corrosionis not only undesirable by reason of its weakening effect on thestrength of the cartridge,

but is likewise annoying becauseit renders illegible' serial numbers,tare weights and other inscriptions usually made on cartridges of thistype.

disadvantages will be readily apparent and need not be further discussedherein. 4

It is therefore an object of the present invention to provide a pressuremedium cartridge shown an envelope forthe container which not only hasthe desired strength and corrosion resisting properties but which islikewise economical to manufacture.

For this purpose, and with reference to Figure 1, the reference numeralindicates a pressure medium cartridge or container made of relativelyhigh tensile strength and non-porous material but having relatively poorcorrosion resisting properties, such, for example, as steel. At 51 is 50completely surrounding it externally andiglo ib. material havingrelatively good corrosion resisting properties. Such an envelope mightconsist of a shell of copper, lead or thelike formed into a cylinderwith one end closed, as at 52, the containerjli being inserted in theshell and the shell being spun in to conform at 53 and 54 with theshoulder portion and the end. portion respectively of tliegc'ontalner50. The invention also contemplates making the coupling I4 and thepressure medium releasing device contained therein from amaterial'resistant to corrosiomso that, when the coupling is threadedinto the neck of the container 50, as at 55,,the container is completelyprotected against external corrosion bythe shell SI and the coupling 14.Alternatively, the invention contemplates making the coupling ll of anysuitable material and protecting all external portions thereof subjectto corrosive action with a material resistant to corrosion,nickel-plating having; been found to be very eflective, for this WhileFigure 1 has been described with par ticular referenceto a shell ii ofmaterial resistant to corrosion, it will be apparent that Figure 1 mayalso represent the use of an envelope of porcelain or rubber solution orany'other suitable corrosion resisting material applied to the containerill externally thereof in any suitable manner.

The "invention also contemplates the use of additional corrosionpreventing means at the junction 56, whenever it is deemed advisable toadopt such additional protective measure.

' 'From the foregoing description it will be seen that I have madedecided improvements in stored pressure cartridges and containers foruse with pressure propelled liquid fire extinguishing mediums', theseimprovements having been made with the economical factor as well as theoperating and maintenance factors in mind. However, Y

while the invention has been described with specific reference to theaccompanying drawings,- it is not to be limited, save as defined in theappended claim.

I claim:

As an article of manufacture a vessel for re-; taining under pressure afluid medium having fire extinguishing properties and having a highpressure three-dimensional phase at ordinary temperatures, comprising aunitary structure consisting of a container proper .of relatively hightensile strength and non-porous metal but having relatively poorcorrosion resisting properties, said container being formed with atleast one end open, a closure member for an open end of the containerhaving means to retain the fluid medium within the container proper,said closure member having relatively good corrosion resistingproperties at least at points in contact with media external thereto,and a shell of metal having relatively good corrosion resistingproperties, but of lesser tensile strength than the metal ofthe'container proper, adapted to receive the container proper and tocompletely enclose itexter nally to a point adjacent said closure memberand sealed at the closure member so as to permanently close oif contactof the container proper with media external thereto.

. DANIEL MAPES

